dremel...
I have done other things with the Dremel but I don't have pics as of yet. I bored and polished the Nova carbs, did this as an experiment to see if polishing the carb intake would make a difference. I also did some minor motor mod work on my cousin's pull start Top engine, I guess it worked since his friends with their Nova rear exhaust and JP mods would not even race him. My point is that the Dremel tool has added a whole new dimension, fun and possibilities to this hobby for myself and a few others.